Water pump - LS MT 3.35 / LS MT 3.40 / LS MT 3.50 / LS MT 3.60 - 40344260
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  • Water pump - LS MT 3.35 / LS MT 3.40 / LS MT 3.50 / LS MT 3.60 - 40344260
  • Water pump - LS MT 3.35 / LS MT 3.40 / LS MT 3.50 / LS MT 3.60 - 40344260
  • Water pump - LS MT 3.35 / LS MT 3.40 / LS MT 3.50 / LS MT 3.60 - 40344260
  • Water pump - LS MT 3.35 / LS MT 3.40 / LS MT 3.50 / LS MT 3.60 - 40344260
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Water pump - LS MT 3.35 / LS MT 3.40 / LS MT 3.50 / LS MT 3.60 - 40344260

Product code: 40344260
Brand LS Tractor
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zł1,830.18 netto
zł2,251.12
Includes VAT 23%

Lowest price from 30 days: zł2,251.12

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Available
5 pieces
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Product description

Water pump dimensions 270 x 220 x 100 mm for LS Tractor tractors of the LS MT3.35, LS MT3.40, LS MT3.50, LS MT3.60 series and others.

The water and coolant pump is one of the most important components of the engine cooling system, and this cooling method is commonly referred to as water cooling . The engine block and cylinder head are components that heat up to very high temperatures during operation, and it is these components that we want to cool with coolant during operation. Special water channels are drilled into the engine and cylinder head to circulate the water, which is then pumped back into the engine's water channels. Coolant circulation is achieved by the water pump , which is usually located between the radiator and the engine and driven by the alternator's V-belt. The pulley is attached to the pump's flywheel, followed by the radiator fan, which rotates in conjunction with the pulley, providing the airflow needed to cool the radiator while the engine is running.

Dimensions :
  • dimensions: 270 x 220 x 100 mm,
  • flywheel diameter: 65 mm,
  • wheel bolt hole spacing: 50 mm (measured diagonally), 35 mm (measured from each other),
  • diameter of the connectors: external 42 / 20 / 20 / 16 mm, internal 33.50 / 17 / 17 / 13 mm,
  • the spacing of the holes for the pump mounting screws is clearly visible in the photo,
  • part numbers: MT40366730, 40265701, MT40265701, 40366730, 40344260.

The most common water pump problems and failures include bearing seizure , which is subjected to high rotational speeds, and components that directly interact with the pump, such as the pulley and fan, which are not always properly balanced. An overly tight belt , a worn belt, a loose V-belt, a V-belt installed at the wrong angle , poor lubrication , or a lack of lubrication are other causes of water pump damage. The first signs of water pump damage or malfunction include an unusual noise from under the hood, a coolant stain under the tractor, or temperature fluctuations visible on the instrument panel gauges.

Warehouse: L01:D-3-1
*Photos are for illustrative purposes only and may differ in detail from the delivered product due to differences in production over the years.

Specifications

Condition
New
Bolt hole spacing (mm)
50 / 35 (koło)
Engine model
LS Mtron L3CRV-T7 STAGE V

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Questions & Answers

Why is regular filter replacement (oil, air, fuel) crucial for a mini tractor?

User
Ekspert Traktor.com.pl – Doradca techniczny • 17.02.2026
Regular filter replacement is the easiest way to extend the life of an engine from brands like Kubota or Yanmar. The oil filter removes metallic contaminants generated during operation, the air filter protects the cylinders from field dust, and the fuel filter prevents water and dirt from damaging the precision injection system. We recommend replacing filters every 50-100 operating hours or at least once per season to ensure optimal engine performance.

How to properly select and sharpen mower blades for a Japanese tractor?

User
Ekspert Traktor.com.pl – Doradca techniczny • 17.02.2026
When selecting mower blades, consider the mower deck model and the blade length and center bore diameter. Maintaining blade balance is crucial when sharpening – an unbalanced blade causes vibrations that damage the hub bearings. Remember that sharp blades mean healthier grass, a cleaner cut, and less strain on the engine of your Iseki or Mitsubishi tractor.

How to identify the correct V-belt size and how to care for it?

User
Ekspert Traktor.com.pl – Doradca techniczny • 17.02.2026
It's best to read the markings on the side of the old V-belt. If they are illegible, measure the belt width and its outer length (La). On Shibaura and Hinomoto tractors, it's important to regularly check the belt tension – too loose a belt will cause slippage and faster wear, while too tight a belt can cause alternator or water pump bearing failure.

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